/Engine/Plugins/Animation/ControlRig/Source/ControlRig/Public/Rigs/RigBoneHierarchy.h
Pretty weird that this type is copy/move assignable (needed for USTRUCTs) but not copy/move constructible.
FRigBoneHierarchy ( [FRigBoneHierarchy](API\Plugins\ControlRig\Rigs\FRigBoneHierarchy) && InOther )